Weather is probably a major factor when you plan your trip to Bella Coola, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 14°C, while the coldest months are December and February, with an average of -3°C. The rainiest months in Bella Coola are November, October, January and December, with each month seeing an average of 338 mm of rainfall.